EP 3196367 B1 20220413 - HYDRAULIC CIRCUIT FOR CONSTRUCTION EQUIPMENT
Title (en)
HYDRAULIC CIRCUIT FOR CONSTRUCTION EQUIPMENT
Title (de)
HYDRAULIKSCHALTUNG FÜR EINE BAUMASCHINE
Title (fr)
CIRCUIT HYDRAULIQUE POUR ENGIN DE CHANTIER
Publication
Application
Priority
KR 2014008745 W 20140919
Abstract (en)
[origin: EP3196367A1] Disclosed is a hydraulic circuit for construction equipment for controlling to selectively supply a hydraulic oil from a hydraulic pump to a hydraulic cylinder for driving a boom. The hydraulic circuit for construction equipment, according to the present invention, comprises: a hydraulic cylinder driven by a hydraulic oil of a hydraulic pump; a direction control valve installed on the oil passage between the hydraulic pump and the hydraulic cylinder; an operating device installed on the oil passage between a pilot pump and the direction control valve; a center by-pass switching valve installed at the most downstream side of a center by-pass passage of the hydraulic pump; a pressure detection sensor that detects the pressure of a hydraulic oil at the large chamber side of the hydraulic cylinder; a jack-up switching valve installed on the oil passage between the operating device and the center by-pass switching valve; and a flow control valve installed in the spool of the direction control valve.
IPC 8 full level
CPC (source: EP US)
E02F 9/20 (2013.01 - US); E02F 9/22 (2013.01 - US); E02F 9/2217 (2013.01 - EP US); E02F 9/2228 (2013.01 - EP); E02F 9/2235 (2013.01 - EP US); E02F 9/2267 (2013.01 - US); E02F 9/2271 (2013.01 - US); E02F 9/2282 (2013.01 - EP US); E02F 9/2285 (2013.01 - US); E02F 9/2292 (2013.01 - US); E02F 9/2296 (2013.01 - EP US); F15B 11/10 (2013.01 - US); F15B 13/027 (2013.01 - US); F15B 21/14 (2013.01 - US); E02F 3/435 (2013.01 - EP); F15B 2211/20546 (2013.01 - US); F15B 2211/41554 (2013.01 - US); F15B 2211/428 (2013.01 - US); F15B 2211/6052 (2013.01 - US); F15B 2211/6313 (2013.01 - US); F15B 2211/6346 (2013.01 - US); F15B 2211/6355 (2013.01 - US); F15B 2211/7053 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3196367 A1 20170726; EP 3196367 A4 20180523; EP 3196367 B1 20220413; CN 106715801 A 20170524; US 2017276151 A1 20170928; WO 2016043365 A1 20160324
DOCDB simple family (application)
EP 14902155 A 20140919; CN 201480082072 A 20140919; KR 2014008745 W 20140919; US 201415512382 A 20140919